Write the correct plural form of each noun in brackets.

1. (Deer) are rare in these forests.
2. She bought several (fish), including three (trout) and two (salmon).
3. Cats are believed to have nine (life).
4. This is a trap for catching (mouse).
5. The grey (sky) of winter depressed her.
6. Artists present (portfolio) of their work at the meeting.
7. (Man) don’t like to live with their (mother-in-law).
8. Strange (phenomenon) were observed by astronomers yesterday.
9. A heavy storm beat down over the (roof) of the houses.